A4 Cabriolet L4-1.8L Turbo (AMB) (2005)
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Remove engine cover(arrows)
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Disconnect the 4-pin harness connector -1- at one ignition coil -2-.
NOTE: For further testing, connect the multimeter to harness connector in place of an ignition coil.
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Connect multimeter for voltage measurement as follows.
Harness connector Terminal
Measure to
1
Engine Ground (GND)
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Switch ignition on.
Specified value: approx. battery voltage
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Switch ignition off.
If specified value is not obtained:
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Remove rubber seal for plenum chamber cover.
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Remove plenum chamber cover -1- toward front (arrows).